Whole House Water Softeners in Princeton

Princeton's 2025 water quality report says the city's drinking water comes from multiple surface water sources delivered by the North Texas Municipal Water District, and the results table it prints carries the signature of the district's Wylie plants. Bromate appears at 2.5 ppb, a by-product of ozone disinfection, along with chlorine dioxide at 0.014 ppm and chlorite at 0.105 ppm, both listed as disinfectant chemistry, and the city's own distribution shows a chlorine residual averaging 2.17 ppm across a range of 0.09 to 3.28. The district's process pages explain the sequence those results come from: ferric sulfate coagulation and settling, then ozone, which the district uses as its primary disinfectant and which it says makes Wylie the largest fully ozonated treatment plant in Texas, then dual-media filters, with chlorine ahead of the filters and ammonia after them to form the chloramine that travels to the member cities. Lavon itself, by the Texas Water Development Board's account, covers 20,622 acres at its conservation pool and holds 412,598 acre-feet, and was enlarged by a project completed in December 1975.

What the report does not print is any secondary constituents table: no total hardness, no calcium or magnesium, no sodium, no dissolved solids. Its inorganic rows run to barium at 0.028 ppm, fluoride at 0.225 ppm, nitrate at 0.373 ppm and a beta emitter reading of 4.1 pCi/L, and then stop. The turbidity row, 0.14 NTU for the highest single reading, shows how clear the finished water is, which says nothing about the minerals dissolved in it. That is why this page carries no hardness figure for Princeton. The district itself describes the water it treats as moderately hard, and traces that chiefly to the minerals in Lavon Lake, calcium bicarbonate, magnesium carbonate, iron and lime among them, and its homeowner arithmetic is the report's mg/L figure over 17.12. For scale only, the member and customer systems on the same Wylie water that do print the district's table, Allen, Little Elm and Milligan Water Supply Corporation among them, show total hardness of 96.0 to 200 ppm for 2025, from the moderately hard class into the very hard class, with calcium between 31.2 and 61.3 ppm and sodium between 41.9 and 88.0 ppm. Those are their printed figures for the district's water, not Princeton's.

Princeton drinks the same lake as those cities, through the same plants, so its hardness almost certainly moves the same way: lighter in the months the lake blend runs soft, heavier when it does not, with no well water in the system to pull it down, and the same for every street in town because the report lists no source but the district. But a figure a utility has not printed is not one we will print for it. The free water test gives Princeton's number at your own kitchen tap, and a unit rated at about 12 grains, the top of the district's range, handles whatever the lake sends in its hardest month.

Sources: City of Princeton, 2025 Water Quality Report · North Texas Municipal Water District, Drinking Water Treatment Process · Texas Water Development Board, Lavon Lake · North Texas Municipal Water District, Water Quality · City of Allen, 2026 Water Quality Report · Town of Little Elm, 2025 Water Quality Report · Milligan Water Supply Corporation, 2025 Consumer Confidence Report